[Superscope]

Hi Karl,

My mistake, my Fluke is actually a 79.
Only 1uA resolution and is quite Old now.

I spoke with Fluke a few minutes ago regarding the 87V.

Sinewave mentioned 0.01uA resolution and indeed, on the Fluke
Website it also states 0.01uA for the 87V. However, on the Suppliers
Website where I originally checked, the Spec says 0.1uA Res.
The accuracy is also 0.2% + 4 Digits, not 2!
Which I now remember is why I had originally ruled this Device out.

I queried this and according to Fluke themselves, the resolution for
the 87V is only 0.1uA!


So I am pretty much back to Square One with the 87V, with an uncertainty
of +-0.475uA


Argus25,

My main requirement (but not exclusively) is for measuring accurately 37.5uA
so that I can Check/Set AVOmeter Analogue Meter Movements correctly. The
AVO Meters spec is entirely dependent on the Movement
being correct. The Meter Movement is precisely 37.5uA FSD in an ideal world.

Now that I have to replace my damaged DMM I thought it was time to get
a more accurate Meter.

A calibrated current source would be ideal, and that is in the Plan eventually,
but I would still need to measure it accurately after I built it!
So still need an accurate measuring device.
Catch 22!

Although it is now starting to lean towards a solution that Karl and Dave
have alluded to.



Ian